Optical instrument



afenfea Ju 1, 1930 UNITED STATES PATE T oFFICE ThiS inventioI1 re1teS to oPtiC1 inStrn- Inents and hasfor itS object to pfodnce a device foI' exerciSing the extrinSic ooulaf 1I1]1S cleS ...by SiInultaneously eecting action of SiInilor muSdes of both eyoS by vafying the relative I)()Siti()n of CertiI1 1e11SeS I)OSSeSSing I)risII1atic choracteristics vVhich are laced before tho eyeS of the patient.

The priIIle obiect of the invention iS t() Pfo dllce a device of this oharaoter of veI'y SiInPle constfucfion Tvhioh nlay be used1n the ofce of nloy be loned to t-he atient vvith (1efiIlite iI1StI'11ctionS for the exeroise of the eye II1I1S oleS, it beiIlg of ooI1TSe underStood that the )atient s11011ld periodically present hiInSe1f to the eye eXIniner for exaInination so the eifec of the inStrunent Inay be ohecked ond the treatn1ent not caffied beyond deSirable lin1itS.

v7ith the gener1 obieot nn1ed in vievv, the invention consistS in ceTtain nove1 and uSefl11 features of constTuction ond organi zotion of )arts as hefeinaftef desoribed and clain1ed; and in order that it may be funy understood, fefeTenoe is to be had to the accoIn anying draWing, in Which= igufe 1 is an elevation of an inStrunlent oonStructed in cCordonce vvith the inveI1 tion.

igure 2 is a Section on the liI1e 1III of figllre 1.

igure 3 iS a I1 enlarged elevotioI1 of the iI1Strl1IIlent vvith one of the coeI' of ffonle I)lateS I'eoVed t() illllstrate the drive gearS. Figure 4L is o sectioIion the line IvIv of igure 3.

In the Said drovving, vvhere li1(e referenoe charocterS identify oorreSPonding PartS in all of the fignres, 1 ond 2 indioote a )oir of Similar fraIne n1eInberS which are ada ted to beSecnred togetheI' by ScrevvS oI' the like3.

he fraIne Inen1bers coniointly foIIn aJ piI" of internal chanlbers or reoeSSeS and a r of SIIlaller chaInberS OI' feceSSes 5, SaJid franles being also cut avvay to Pfovide nose piece 6.

^S a convenient n1ethod of Inounting the device, the frome Plate 1 iS forIned with o paif of extensionS 7 vvhereby the froIne Inoy be SeCured to a sllitable Standafd 8.

oU lfotatably Teceived vvithiI1 the feceSSes is a air of geI' teeth-equipPed lenSe Inount ingS 9 ech of vvhich Iny crry 9. I)lurality of Suitable lenSeS So n1OUnted aJS to give a PTiS Intio ef1 ect upon theiI relative Inoven1ent for Said Inountings Inay each Carry a P1l1ra1it of pTisnls,c but prefefably the mountingS 9 each caTry a Single pfiSn1 10, Said I)riSn1s preferably being both Inounted v7ith their faceS tlp oI' dovvn vvhen they aIe in norInal oSition. The gear teeth-equipPed Inonnt ingS 9 ore intercon1eoted by a pair of Sman gears 11 rotatable oI1 Shaft 11 so fhat the lenSeS Shall be siInultoneously turned in o )osite directions I1 )o11 rotation of one of the InountingS 9.

S o convenient nleaIIS ofdriving the rotataf)le leI1SeS, the fra ne plates 1 and 2 are foTIned vvith sini1o1' extensionS 12 ot one of theiI' endS nd are internally receSSed t() I)I vide a veftica1 passngevvay through Tvhich a rook bor 13 is adapted to Slido, Said rack baf being provided vith teeth for dri ing en ga eInent With the teeth of ()ne of the Inount ingS 9. The fack iS Preferably of Such length that Inovement theTeoffor itS fun length vvi11 effect one coInPlete rotation of the ai of leI1SeS. of couTSe, any sllitable Inethod of Tofating the lenSeS, S11ch aS a orank oI' geaI Inay be SubStituted foI' fhe rack.

1S it is deSiroble to knovv the eXact point art Tvhich the lenSes have noved a onehalf revolutioI1, the extenSionS 12 Crry a ba11 de fent 11 equipped vith an eX ansion S ring 15 vvhic11is adapted to ffictiona11y eIlter o notch 16 for ned iI1 the back of the rock bor 13. The notch iS ositioned half the distance fron1 the op osite endS of the rack teeth So thot When the ba11 detent 1 enteTS the notch 16, it vvi11 not Tnove beyond sl1Ch point Witho t additional force being a Hed. The operatoI iS thereby autoInaticaHy notiHed ofthe )osition of the rototing lenseS 10, and he Iny then returo them to initial oSition b re veTSel Inoving the baf 13, or Inay contlnue the u vvord InoveInent of the bar, de ending 011 the natufe of the treatInent I'e(111ire(1 by the eyeS of the ptient.

vvith the device aS illuStrated iI1 the dravv ing, the raok 13 being in doWn oSition and the riSn1S 10 bein n1ounted baseS(1ovv11, it

coinoiding of a11 tiIneS. The eyeS 1ech theiI' 1ilT1it of convergence 11en the lenSes have boen I otIte(1 a one-foI1Tth revolution, at vhich tiIne the baSeS of the )riSII1S 10 are o11t. TJpon continned Inoven1ent of the Tack bar, the eyeS vi11 a pfoch, the 11orizontal )1aneS Stil1 coinoiding and .at the inStant the detent 1 enterS the notCh 16 the rack haS T11oved half of its length and the eyeS Wi11 feach nofmal, aS tlle baSeS of t11o priSmS Wi11be up. 5 the npvvard n1oveInent of the rack bor 13 iS coI1- tinned, the eyeS of the otient vil1 coTnInence to diverge and X hen the bar hoS II1oved three fourthS of itS length ffoIn dovvn )osition, the eyes iI1 hve diverged, the baseS of the prisInS 10 being at thiS time both in, adi cent the noSo of the 1)atient. uTther 11I)vVard Inoven1ent of the rack 13 finally retornS the eyeS to norn1o1, the vertical laneS of the inlageS of the eyeS being coincident. It vil1 be evident t11t the above operationS vi1l be revefsed u on the dovnTvard InoveInent of the fack. It vil1 be apParent that if it iS deSifed to exeroiSe the ooLllaI xnL1ScleS controlling convergenCe, the ptient vvi11 be in Structed to operate the device ffon1 initio1 oSition of the raok bar 13 11ntil InoveInent iS interrn to1 by the detent 14, nd to then reverSe the direotion of the InoveInent of the bar. ()T1 the contrary, Shou1d it be deSired to exeTCiSe the oc111ar n1uSoleS controlling di vergonce, the )tient vvill be inStructed to I1Se the detent 11 )osition aS the initia1 oSition, and to operate the baT 13 ffoIn thiS )oSition only, and never to tItiliZe thaf poftioI1 of the Tack above the detent. Ton1 a consider tion of the nture of the inveI1tion it vi1l be evident that olthongh Single pTiSnS are i1111S trted, t1xe device can readily be Inade to uti1- iZe double )riSInS, oI Suitable lenSes so IT1ollnted aS to give riSnlatic effect. It is alSo to be pointed out that the device nlay be Inade adiuStoble to Suit pn iHary diStance by mefe ly roviding it vVith tho teleSoo ing dTive Shaft interconnecting the n1ain dTive geaTS of the Structnre.

`ro1n the above description. it Tvi11 be ap arent that I have pfoduced device eInbody ing all the featureS of advantage )ointed out S deSirable, and vv11ile I hve deso ibed and ClHhned the referred embodiment of the in Yofion, it iS fo be undeTStood that I feserve the right to make an changeS roperly fa11 ing Within the S irif and soo e of the a pended ClaiIns.

I ClaiIn= 1. n eye eXercisor coIn riSing a fraTIle having a )Li of eye o eningS, 1enSeS oa able of roducing a risInatic effect n1Ounted in Said openingS, SELid lenseS in initial )oSition,

being d ted to roduoe ooinCideI1t iInageS iI1 the eyes of the patient, IneanS intercoI1 necting the lenses to SiII1L1ltneouS1y Totate then1 in o poSite directionS to effect InuScI113I' exeroiSe of the eyeS, nd Stop foI' auto- Tnatically indicating the extent of fottion in one direction.

2. 1n eye exefoiSeI' coTIlpriSing -a fraIne having a pair of o eningS, a Totatb1e toothed 1'ing Inounted in each of Said o eningS, leI1Ses caffied by Soid ringS, a rack baI' enIIlesheCl Tvith the teeth of one of Said riIl s, and IneanS intefConneCting Said TingS vvheTf)y II1ove111ent iIn )arte1 b S1i(1 Taok Shal1 SiIT1111taIleoI1sly O oSitely Totte the TingS.

3. 11n eye exeroiSer oon1 riSing a froIne having a )air of eye o eningS, )riSn1tic lenSeS rotatably Inounted in each of Said o en ingS, driving oonnections intefconnecting Said lenSeS, and reciPTocating IneanS to ifnPaft ro tation to one of Said lenSes.

In vitneSS vvhereof 1 hereunto aix Iny Sig nature.

JoSEPH J. KBN EBEoK. 

